How to fix/repair invalid node structure on Mac?

"Invalid Node Structure" is a sign of corrupted storage disk directory structure. When invalid node structure error happens, most of the time we would get stuck at the gray screen with Apple logo and spinning wheel. We may be lucky to boot into the operating-system after we get into this trouble, but we will lose some applications and files.

So, is there any way to repair/fix invalid node structure on Mac without data loss? Fortunately, there is solution to repair/fix invalid node structure on Mac without data loss.

How to repair/fix invalid node structure on Mac without data loss

We can recover data from invalid node structure hard drive with Mac data recovery software, and then repair/fix invalid node structure on Mac with Disk Utility.